Calculus is the mathematics of change---a
subject that originated in the study of motion. Calculus deals with
ideas that people have pondered for centuries: areas and volumes, rates
of change, the orbits of planets, and infinite sequences.

Precalculus consists of those subjects,
skills, and insights needed to understand calculus. It includes
arithmetic, algebra, coordinate geometry, trigonometry, and, most of
all, functions---the general concept as well as specific functions.
Students come to this course familiar with basic arithmetic, algebra
and geometry. A precalculus course builds on all of their previous
mathematical knowledge and experience.